SPRUIV7B May 2022 – September 2023 AM620-Q1 , AM623 , AM625 , AM625-Q1 , AM625SIP
The reference clock MCU_PLL0_REF_CLK for the PLL in MCU domain is chosen between the internal high-frequency (HF) oscillator with external crystal (HFOSC0) and 12.5-MHz free-running RC oscillator. The selection is made through CTRLMMR_MCU_PLL_CLKSEL[8] CLKLOSS_SWTCH_EN, see Table 6-27.
CTRLMMR_MCU_PLL_CLKSEL(1)[8] CLKLOSS_SWTCH_EN | MCU_PLL0_REF_CLK |
---|---|
0 (default) | HFOSC0_CLK |
1 | CLK_12M_RC if clock loss is
detected or HFOSC0_CLK if clock loss is not detected |